Examine source code of RSS Harpoon

{
  "manifest_version": 3,
  "name": "RSS Harpoon",
  "version": "1.0.0",
  "description": "Ajoute un bouton RSS aux pages de chaînes YouTube afin de copier leur flux vidéo.",
  "author": "René Drouin & Astor",
  "homepage_url": "https://www.mioursmipanda.fr",
  "permissions": [
    "clipboardWrite"
  ],
  "host_permissions": [
    "*://*.youtube.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "content.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "48": "icons/rss-48.png",
    "96": "icons/rss-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "rss-harpoon@mioursmipanda.fr",
      "strict_min_version": "128.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}